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Selecting the wrong blower leads to wasted energy, noise issues, and early failure. This guide shows how to select the right MD Pneumatics positive displacement blower based on airflow, pressure, vacuum, and real application demands. It gives engineers and operators a clear path from requirements to the correct blower series and package.  

MD Selection Guide Cover Photo

What This Guide Helps You Do

The MD Pneumatics Blower Selection Guide explains how positive displacement blowers work, how performance is measured, and how to match blower technology to process needs. It focuses on practical decisions that affect reliability, operating cost, and long‑term performance.  

You will learn how to: 

  • Define airflow, pressure, and vacuum requirements correctly
  • Understand ACFM, SCFM, and ICFM and when each matters
  • Compare MD Pneumatics blower technologies and packages
  • Select a blower that fits process conditions, space limits, and noise expectations 

What Is a Positive Displacement Blower

A blower moves air or gas at higher pressure than a fan by displacing a fixed volume with each rotation. MD Pneumatics blowers use positive displacement technology, which makes them well suited for conveying, aeration, wastewater treatment, and industrial gas handling.  

Because pressure or vacuum is created by downstream or upstream restriction, correct sizing matters. Oversizing increases energy use. Under sizing limits system output. This guide explains how to avoid both.  

Key Performance Terms Explained

The guide breaks down the terms that drive blower selection and system performance:  

Airflow

  • ACFM: Actual airflow at inlet conditions
  • SCFM: Airflow normalized to standard conditions
  • ICFM: Airflow measured at the blower inlet, often the most useful for real systems

 

Pressure and Vacuum

  • Pressure measured in psig, bar, or inches of water
  • Vacuum measured in inches of mercury

 

Efficiency and Noise

  • Mechanical, volumetric, and energy efficiency affect operating cost
  • Noise levels measured in dBA influence enclosure and package choice 

MD Pneumatics Blower Technologies Covered

The guide compares all major MD Pneumatics blower series, explaining where each fits best:  

  • PD Plus Blowers: Designed for high‑pressure industrial applications with proven durability and dual oil sumps.
  • CP Series: Built for the highest pressure capability in its class with advanced sealing to reduce leaks and contamination.
  • Equalizer Series: Features a single‑piece housing and helical gears to reduce vibration and alignment issues.
  • QX Series: Uses a tri‑lobe rotor design for lower pulsation, quieter operation, and strong efficiency at higher pressures.
  • Blower Packages: Factory‑assembled systems that simplify installation and include options for sound control and instrumentation.  

How to Choose the Right Blower for Your Application

The guide outlines a structured approach that starts with the process, not the product: 

  1. Define the blower’s role in the system
  2. Quantify airflow and pressure needs across operating ranges
  3. Account for temperature, altitude, and ambient conditions
  4. Review chemical compatibility and material exposure
  5. Consider space limits, maintenance access, and noise limits

This method reduces trial‑and‑error selection and helps avoid redesigns after installation. 

Blower Package and Model Comparison Tables

Detailed tables compare: 

  • Airflow ranges up to 9,000+ cfm
  • Pressure capability up to 40 psig in two‑stage designs
  • Vacuum limits for dry and wet operation
  • Package features such as enclosures, cooling, and instrumentation 

These comparisons make it easier to narrow options before detailed sizing. 

Industries and Applications Addressed

The guide reflects real use cases across industries that rely on consistent airflow and pressure control, including wastewater treatment, chemical processing, dry bulk conveying, food processing, plastics, power generation, and aquaculture.  

For additional background on applications and product data, reference the MD Pneumatics website. MD Pneumatics Blowers 

Download the Blower Selection Guide

Use this guide as a reference during system design, upgrades, or blower replacement planning. 

Frequently Asked Questions

Blowers operate at higher pressures using positive displacement technology, making them suitable for conveying and process applications where fans fall short. [ 

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